Question

While hiking, Marek throws a rock off a cliff that is roughly 10 meters above a lake. This situation is modeled by the equation h=−4.9t2+10
, with h representing the height in meters and t the time in seconds. If you were to set up a table to determine when the rock hits the water, what would be a reasonable scale for the range?(1 point)
Responses

2
2

110
1 tenth

5
5

10
10

Answer 1

10 — because h ranges from the starting height 10 m down to 0 m (water). (For reference it hits the water when −4.9t²+10=0 ⇒ t≈1.43 s.)